Selenium ChromeDriver 返回未知错误：无法发现打开的页面

Question

我已经创建了一个maven项目，里面的测试包添加了一个testNg测试用例：

public class SampleTestNGTest {    
    private WebDriver driver;       
        @Test               
        public void testEasy() {
                    System.setProperty("webdriver.chrome.driver","D:\\NetBeansProjects\\webdrivertestng\\Drivers\\chromedriver.exe");
                    driver = new ChromeDriver();
            driver.get("example.com");  
            String title = driver.getTitle();
                        Assert.assertTrue(title.contains("abcd")); 
                        //System.out.println("checking new build");
        }   

        @AfterTest
        public void afterTest() {
            driver.quit();          
        }                
}

我在 Netbeans 中完美地执行了它，没有任何错误。但是当我从 Jenkins 执行时（将 Maven 项目与 Jenkins 集成），它显示以下错误：

Running SampleTestNGTest
Configuring TestNG with: org.apache.maven.surefire.testng.conf.TestNG652Configurator@6d8acf
Starting ChromeDriver 2.14.313457 (3d645c400edf2e2c500566c9aa096063e707c9cf) on port 2916
Only local connections are allowed.
Tests run: 2, Failures: 2, Errors: 0, Skipped: 0, Time elapsed: 64.572 sec <<< FAILURE!
testEasy(SampleTestNGTest)  Time elapsed: 63.571 sec  <<< FAILURE!
org.openqa.selenium.WebDriverException: unknown error: unable to discover open pages
  (Driver info: chromedriver=2.14.313457 (3d645c400edf2e2c500566c9aa096063e707c9cf),platform=Windows NT 6.1 SP1 x86) (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 61.32 seconds
Build info: version: '2.53.0', revision: '35ae25b1534ae328c771e0856c93e187490ca824', time: '2016-03-15 10:43:46'
System info: host: 'MVSL1742', ip: '172.16.17.42', os.name: 'Windows 7', os.arch: 'x86', os.version: '6.1', java.version: '1.8.0_05'
Driver info: org.openqa.selenium.chrome.ChromeDriver
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
    at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:206)
    at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:158)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:678)
    at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:249)
    at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:131)
    at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:144)
    at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:170)
    at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:159)
    at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:116)
    at SampleTestNGTest.testEasy(SampleTestNGTest.java:24)

afterTest(SampleTestNGTest)  Time elapsed: 63.573 sec  <<< FAILURE!
java.lang.NullPointerException
    at SampleTestNGTest.afterTest(SampleTestNGTest.java:37)


Results :

Failed tests:   testEasy(SampleTestNGTest): unknown error: unable to discover open pages(..)
  afterTest(SampleTestNGTest)

Tests run: 2, Failures: 2, Errors: 0, Skipped: 0

1. 如果我使用 FirefoxDriver，构建执行时不会出错。

2. 如果我使用 ChromeDriver，构建会出错。

pom .xml

<dependency>
    <groupId>org.seleniumhq.selenium</groupId>
    <artifactId>selenium-chrome-driver</artifactId>
    <version>2.53.0</version>
</dependency>

编辑：在我的本地机器上，ChromeDriver 版本是 2.9

Answer 1

您使用的是非常旧的 ChromeDriver 版本。

从您的错误日志来看，它似乎是：2.14，而最后一个版本是 2.9！

从here 下载更新版本，然后重试。还要确保您没有使用最新的 Chrome 浏览器版本，因为 Selenium 支持总是滞后。例如，目前最新的 ChromeDriver 2.9 仅支持 Chrome 浏览器版本 31-34。你可以看到它here。